This forum is for Audacity 2.x.x on GNU/Linux and Unix-like operating systems.Please state which version of Linux you are using, the exact three-section version number of Audacity from Help > About Audacity... and whether you installed your distribution's release or daily version of Audacity or compiled Audacity from source code.

Audacity 1.2.x and 1.3.x are obsolete and no longer supported. If you still have those versions, please upgrade at https://www.audacityteam.org/download/.The old forums for those versions are now closed, but you can still read the archives of the 1.2.x and 1.3.x forums.

If you've not mixed the tracks (the overdub is on its own in a separate track), the yes you can:1) Select the overdub track (click on an empty portion of the info panel on the left end of the track, but take care not to catch the sliders or buttons)2) File menu > Export Selected Audio (may be in a sub-menu, depending on which version of Audacity).